diff options
Diffstat (limited to 'source/blender/modifiers/intern/MOD_decimate.c')
| -rw-r--r-- | source/blender/modifiers/intern/MOD_decimate.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/source/blender/modifiers/intern/MOD_decimate.c b/source/blender/modifiers/intern/MOD_decimate.c new file mode 100644 index 00000000000..9163a9771f0 --- /dev/null +++ b/source/blender/modifiers/intern/MOD_decimate.c @@ -0,0 +1,199 @@ +/* +* $Id$ +* +* ***** BEGIN GPL LICENSE BLOCK ***** +* +* This program is free software; you can redistribute it and/or +* modify it under the terms of the GNU General Public License +* as published by the Free Software Foundation; either version 2 +* of the License, or (at your option) any later version. +* +* This program is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +* GNU General Public License for more details. +* +* You should have received a copy of the GNU General Public License +* along with this program; if not, write to the Free Software Foundation, +* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. +* +* The Original Code is Copyright (C) 2005 by the Blender Foundation. +* All rights reserved. +* +* Contributor(s): Daniel Dunbar +* Ton Roosendaal, +* Ben Batt, +* Brecht Van Lommel, +* Campbell Barton +* +* ***** END GPL LICENSE BLOCK ***** +* +*/ + +#include "DNA_meshdata_types.h" + +#include "BLI_math.h" + +#include "BKE_cdderivedmesh.h" +#include "BKE_mesh.h" +#include "BKE_modifier.h" +#include "BKE_particle.h" + +#include "MEM_guardedalloc.h" + +#include "LOD_decimation.h" + + +static void initData(ModifierData *md) +{ + DecimateModifierData *dmd = (DecimateModifierData*) md; + + dmd->percent = 1.0; +} + +static void copyData(ModifierData *md, ModifierData *target) +{ + DecimateModifierData *dmd = (DecimateModifierData*) md; + DecimateModifierData *tdmd = (DecimateModifierData*) target; + + tdmd->percent = dmd->percent; +} + +static DerivedMesh *applyModifier( + ModifierData *md, Object *ob, DerivedMesh *derivedData, + int useRenderParams, int isFinalCalc) +{ + DecimateModifierData *dmd = (DecimateModifierData*) md; + DerivedMesh *dm = derivedData, *result = NULL; + MVert *mvert; + MFace *mface; + LOD_Decimation_Info lod; + int totvert, totface; + int a, numTris; + + mvert = dm->getVertArray(dm); + mface = dm->getFaceArray(dm); + totvert = dm->getNumVerts(dm); + totface = dm->getNumFaces(dm); + + numTris = 0; + for (a=0; a<totface; a++) { + MFace *mf = &mface[a]; + numTris++; + if (mf->v4) numTris++; + } + + if(numTris<3) { + modifier_setError(md, + "Modifier requires more than 3 input faces (triangles)."); + goto exit; + } + + lod.vertex_buffer= MEM_mallocN(3*sizeof(float)*totvert, "vertices"); + lod.vertex_normal_buffer= MEM_mallocN(3*sizeof(float)*totvert, "normals"); + lod.triangle_index_buffer= MEM_mallocN(3*sizeof(int)*numTris, "trias"); + lod.vertex_num= totvert; + lod.face_num= numTris; + + for(a=0; a<totvert; a++) { + MVert *mv = &mvert[a]; + float *vbCo = &lod.vertex_buffer[a*3]; + float *vbNo = &lod.vertex_normal_buffer[a*3]; + + copy_v3_v3(vbCo, mv->co); + normal_short_to_float_v3(vbNo, mv->no); + } + + numTris = 0; + for(a=0; a<totface; a++) { + MFace *mf = &mface[a]; + int *tri = &lod.triangle_index_buffer[3*numTris++]; + tri[0]= mf->v1; + tri[1]= mf->v2; + tri[2]= mf->v3; + + if(mf->v4) { + tri = &lod.triangle_index_buffer[3*numTris++]; + tri[0]= mf->v1; + tri[1]= mf->v3; + tri[2]= mf->v4; + } + } + + dmd->faceCount = 0; + if(LOD_LoadMesh(&lod) ) { + if( LOD_PreprocessMesh(&lod) ) { + /* we assume the decim_faces tells how much to reduce */ + + while(lod.face_num > numTris*dmd->percent) { + if( LOD_CollapseEdge(&lod)==0) break; + } + + if(lod.vertex_num>2) { + result = CDDM_new(lod.vertex_num, 0, lod.face_num); + dmd->faceCount = lod.face_num; + } + else + result = CDDM_new(lod.vertex_num, 0, 0); + + mvert = CDDM_get_verts(result); + for(a=0; a<lod.vertex_num; a++) { + MVert *mv = &mvert[a]; + float *vbCo = &lod.vertex_buffer[a*3]; + + copy_v3_v3(mv->co, vbCo); + } + + if(lod.vertex_num>2) { + mface = CDDM_get_faces(result); + for(a=0; a<lod.face_num; a++) { + MFace *mf = &mface[a]; + int *tri = &lod.triangle_index_buffer[a*3]; + mf->v1 = tri[0]; + mf->v2 = tri[1]; + mf->v3 = tri[2]; + test_index_face(mf, NULL, 0, 3); + } + } + + CDDM_calc_edges(result); + CDDM_calc_normals(result); + } + else + modifier_setError(md, "Out of memory."); + + LOD_FreeDecimationData(&lod); + } + else + modifier_setError(md, "Non-manifold mesh as input."); + + MEM_freeN(lod.vertex_buffer); + MEM_freeN(lod.vertex_normal_buffer); + MEM_freeN(lod.triangle_index_buffer); + +exit: + return result; +} + + +ModifierTypeInfo modifierType_Decimate = { + /* name */ "Decimate", + /* structName */ "DecimateModifierData", + /* structSize */ sizeof(DecimateModifierData), + /* type */ eModifierTypeType_Nonconstructive, + /* flags */ eModifierTypeFlag_AcceptsMesh, + /* copyData */ copyData, + /* deformVerts */ 0, + /* deformVertsEM */ 0, + /* deformMatricesEM */ 0, + /* applyModifier */ applyModifier, + /* applyModifierEM */ 0, + /* initData */ initData, + /* requiredDataMask */ 0, + /* freeData */ 0, + /* isDisabled */ 0, + /* updateDepgraph */ 0, + /* dependsOnTime */ 0, + /* foreachObjectLink */ 0, + /* foreachIDLink */ 0, +}; |